[mike827]

As for seedling to hydro goes, the method that I have found works the best is using the "paper towel method" (check the "germination 420" sticky), where, essentially, you place the seed in a moist paper towel and seal it in a zip lock bag. Then put it in a warm dark place and check them once a day. Checking them serves a dual purpose, to see when they have cracked open, and to give them vital CO2, O2, etc. Once the seeds have cracked open and a small white taproot has emerged, transplant them into your rock wool, and put them straight in your system with NO NUTRIENTS. I made the mistake. Even a low PPM will FUCK your plants (in my case anyway). I waited until at least the 4th leaf-set to apply even 1/4 strength nutrients.

Cloning is simple, cut off a trimming with a leaf-set on it, and build an ultrasonic fogging cloner. Check out MordGrow's ultrasonic fogger cloner machine. I've also heard mixed results with using rooting gel. (stick the cutting in this gel shit that supposedly stimulates root growth, while simultaneously supporting the plant upright.)

As for putting the clone and main chamber in the same unit, the only thing I would worry about is light leaks. If you have a 24/0 schedule in the clone area, and a 12/12 in the flowering main box, if light leaks into your flowering chamber, It'll fuck with the plant and at worst stop it from flowering, but it could also stress the plant into producing lower yields, or worse, going hermie.